/* COFF information for TI COFF support. Definitions in this file should be customized in a target-specific file, and then this file included (see tic54x.h for an example). Copyright 2000, 2001, 2002, 2003, 2005, 2008, 2009 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef COFF_TI_H #define COFF_TI_H /* Note "coff/external.h is not used because TI adds extra fields to the structures. */ /********************** FILE HEADER **********************/ struct external_filehdr { char f_magic[2]; /* magic number */ char f_nscns[2]; /* number of sections */ char f_timdat[4]; /* time & date stamp */ char f_symptr[4]; /* file pointer to symtab */ char f_nsyms[4]; /* number of symtab entries */ char f_opthdr[2]; /* sizeof(optional hdr) */ char f_flags[2]; /* flags */ char f_target_id[2]; /* magic no. (TI COFF-specific) */ }; /* COFF0 has magic number in f_magic, and omits f_target_id from the file header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2 and the target-specific magic number is found in f_target_id */ #define TICOFF0MAGIC TI_TARGET_ID #define TICOFF1MAGIC 0x00C1 #define TICOFF2MAGIC 0x00C2 #define TICOFF_AOUT_MAGIC 0x0108 /* magic number in optional header */ #define TICOFF 1 /* customize coffcode.h */ /* The target_id field changes depending on the particular CPU target */ /* for COFF0, the target id appeared in f_magic, where COFFX magic is now */ #ifndef TI_TARGET_ID #error "TI_TARGET_ID needs to be defined for your CPU" #endif /* Which bfd_arch to use... */ #ifndef TICOFF_TARGET_ARCH #error "TICOFF_TARGET_ARCH needs to be defined for your CPU" #endif #ifndef TICOFF_TARGET_MACHINE_GET #define TICOFF_TARGET_MACHINE_GET(FLAGS) 0 #endif #ifndef TICOFF_TARGET_MACHINE_SET #define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE) #endif /* Default to COFF2 for file output */ #ifndef TICOFF_DEFAULT_MAGIC #define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC #endif /* This value is made available in the rare case where a bfd is unavailable */ #ifndef OCTETS_PER_BYTE_POWER #error "OCTETS_PER_BYTE_POWER not defined for this CPU" #else #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER) #endif /* default alignment is on a byte (not octet!) boundary */ #ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0 #endif /* TI COFF encodes the section alignment in the section header flags */ #define COFF_ALIGN_IN_SECTION_HEADER 1 #define COFF_ALIGN_IN_S_FLAGS 1 /* requires a power-of-two argument */ #define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8)) /* result is a power of two */ #define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF) #define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0) #define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01) #define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC) #define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID) #define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID) /* we need to read/write an extra field in the coff file header */ #ifndef COFF_ADJUST_FILEHDR_IN_POST #define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \ do \ { \ if (!COFF0_P (abfd)) \ ((struct internal_filehdr *)(dst))->f_target_id = \ H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id); \ } \ while (0) #endif #ifndef COFF_ADJUST_FILEHDR_OUT_POST #define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \ do \ { \ if (!COFF0_P (abfd)) \ H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \ ((FILHDR *)(dst))->f_target_id); \ } \ while (0) #endif #define FILHDR struct external_filehdr #define FILHSZ 22 #define FILHSZ_V0 20 /* COFF0 omits target_id field */ /* File header flags */ #define F_RELFLG (0x0001) #define F_EXEC (0x0002) #define F_LNNO (0x0004) #define F_VERS (0x0010) /* TMS320C4x code */ /* F_LSYMS needs to be redefined in your source file */ #define F_LSYMS_TICOFF (0x0010) /* normal COFF is 0x8 */ #define F_10 0x00 /* file built for TMS320C1x devices */ #define F_20 0x10 /* file built for TMS320C2x devices */ #define F_25 0x20 /* file built for TMS320C2x/C5x devices */ #define F_LENDIAN 0x0100 /* 16 bits/word, LSB first */ #define F_SYMMERGE 0x1000 /* duplicate symbols were removed */ /********************** OPTIONAL HEADER **********************/ typedef struct { char magic[2]; /* type of file (0x108) */ char vstamp[2]; /* version stamp */ char tsize[4]; /* text size in bytes, padded to FW bdry*/ char dsize[4]; /* initialized data " " */ char bsize[4]; /* uninitialized data " " */ char entry[4]; /* entry pt. */ char text_start[4]; /* base of text used for this file */ char data_start[4]; /* base of data used for this file */ } AOUTHDR; #define AOUTHDRSZ 28 #define AOUTSZ 28 /********************** SECTION HEADER **********************/ /* COFF0, COFF1 */ struct external_scnhdr_v01 { char s_name[8]; /* section name */ char s_paddr[4]; /* physical address, aliased s_nlib */ char s_vaddr[4]; /* virtual address */ char s_size[4]; /* section size (in WORDS) */ char s_scnptr[4]; /* file ptr to raw data for section */ char s_relptr[4]; /* file ptr to relocation */ char s_lnnoptr[4]; /* file ptr to line numbers */ char s_nreloc[2]; /* number of relocation entries */ char s_nlnno[2]; /* number of line number entries*/ char s_flags[2]; /* flags */ char s_reserved[1]; /* reserved */ char s_page[1]; /* section page number (LOAD) */ }; /* COFF2 */ struct external_scnhdr { char s_name[8]; /* section name */ char s_paddr[4]; /* physical address, aliased s_nlib */ char s_vaddr[4]; /* virtual address */ char s_size[4]; /* section size (in WORDS) */ char s_scnptr[4]; /* file ptr to raw data for section */ char s_relptr[4]; /* file ptr to relocation */ char s_lnnoptr[4]; /* file ptr to line numbers */ char s_nreloc[4]; /* number of relocation entries */ char s_nlnno[4]; /* number of line number entries*/ char s_flags[4]; /* flags */ char s_reserved[2]; /* reserved */ char s_page[2]; /* section page number (LOAD) */ }; /* * Special section flags */ /* TI COFF defines these flags; STYP_CLINK: the section should be excluded from the final linker output if there are no references found to any symbol in the section STYP_BLOCK: the section should be blocked, i.e. if the section would cross a page boundary, it is started at a page boundary instead. TI COFF puts the section alignment power of two in the section flags e.g. 2**N is alignment, flags |= (N & 0xF) << 8 */ #define STYP_CLINK (0x4000) #define STYP_BLOCK (0x1000) #define STYP_ALIGN (0x0F00) /* TI COFF stores section alignment here */ #define SCNHDR_V01 struct external_scnhdr_v01 #define SCNHDR struct external_scnhdr #define SCNHSZ_V01 40 /* for v0 and v1 */ #define SCNHSZ 48 /* COFF2 changes the offsets and sizes of these fields Assume we're dealing with the COFF2 scnhdr structure, and adjust accordingly. Note: The GNU C versions of some of these macros are necessary in order to avoid compile time warnings triggered gcc's array bounds checking. The PUT_SCNHDR_PAGE macro also has the advantage on not evaluating LOC twice. */ #define GET_SCNHDR_NRELOC(ABFD, LOC) \ (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC)) #define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \ (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC)) #ifdef __GNUC__ #define GET_SCNHDR_NLNNO(ABFD, LOC) \ ({ \ int nlnno; \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ nlnno = H_GET_32 (ABFD, ptr); \ else \ nlnno = H_GET_16 (ABFD, ptr - 2); \ nlnno; \ }) #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \ do \ { \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ H_PUT_32 (ABFD, VAL, ptr); \ else \ H_PUT_16 (ABFD, VAL, ptr - 2); \ } \ while (0) #define GET_SCNHDR_FLAGS(ABFD, LOC) \ ({ \ int flags; \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ flags = H_GET_32 (ABFD, ptr); \ else \ flags = H_GET_16 (ABFD, ptr - 4); \ flags; \ }) #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \ do \ { \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ H_PUT_32 (ABFD, VAL, ptr); \ else \ H_PUT_16 (ABFD, VAL, ptr - 4); \ } \ while (0) #define GET_SCNHDR_PAGE(ABFD, LOC) \ ({ \ unsigned page; \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ page = H_GET_16 (ABFD, ptr); \ else \ page = (unsigned) H_GET_8 (ABFD, ptr - 7); \ page; \ }) /* On output, make sure that the "reserved" field is zero. */ #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \ do \ { \ char * ptr = (LOC); \ if (COFF2_P (ABFD)) \ H_PUT_16 (ABFD, VAL, ptr); \ else \ { \ H_PUT_8 (ABFD, VAL, ptr - 7); \ H_PUT_8 (ABFD, 0, ptr - 8); \ } \ } \ while (0) #else #define GET_SCNHDR_NLNNO(ABFD, LOC) \ (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2)) #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \ (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2)) #define GET_SCNHDR_FLAGS(ABFD, LOC) \ (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4)) #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \ (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4)) #define GET_SCNHDR_PAGE(ABFD, LOC) \ (COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7)) /* On output, make sure that the "reserved" field is zero. */ #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \ (COFF2_P (ABFD) \ ? H_PUT_16 (ABFD, VAL, LOC) \ : H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8)) #endif /* TI COFF stores section size as number of bytes (address units, not octets), so adjust to be number of octets, which is what BFD expects */ #define GET_SCNHDR_SIZE(ABFD, SZP) \ (H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD)) #define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \ H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP) #define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \ do \ { \ ((struct internal_scnhdr *)(INT))->s_page = \ GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page); \ } \ while (0) /* The entire scnhdr may not be assigned. Ensure that everything is initialized. */ #define COFF_ADJUST_SCNHDR_OUT_PRE(ABFD, INT, EXT) \ do \ { \ memset((EXT), 0, sizeof (SCNHDR)); \ } \ while (0) /* The line number and reloc overflow checking in coff_swap_scnhdr_out in coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc. Due to different sized v0/v1/v2 section headers, we have to re-write these fields. */ #define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \ do \ { \ PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno, \ ((SCNHDR *)(EXT))->s_nlnno); \ PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\ ((SCNHDR *)(EXT))->s_nreloc); \ PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags, \ ((SCNHDR *)(EXT))->s_flags); \ PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page, \ ((SCNHDR *)(EXT))->s_page); \ } \ while (0) /* * names of "special" sections */ #define _TEXT ".text" #define _DATA ".data" #define _BSS ".bss" #define _CINIT ".cinit" /* initialized C data */ #define _SCONST ".const" /* constants */ #define _SWITCH ".switch" /* switch tables */ #define _STACK ".stack" /* C stack */ #define _SYSMEM ".sysmem" /* used for malloc et al. syscalls */ /********************** LINE NUMBERS **********************/ /* 1 line number entry for every "breakpointable" source line in a section. * Line numbers are grouped on a per function basis; first entry in a function * grouping will have l_lnno = 0 and in place of physical address will be the * symbol table index of the function name. */ struct external_lineno { union { char l_symndx[4]; /* function name symbol index, iff l_lnno == 0*/ char l_paddr[4]; /* (physical) address of line number */ } l_addr; char l_lnno[2]; /* line number */ }; #define LINENO struct external_lineno #define LINESZ 6 /********************** SYMBOLS **********************/ /* NOTE: this is what a local label looks like in assembly source; what it looks like in COFF output is undefined */ #define TICOFF_LOCAL_LABEL_P(NAME) \ ((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \ || NAME[strlen(NAME)-1] == '?') #define E_SYMNMLEN 8 /* # characters in a symbol name */ #define E_FILNMLEN 14 /* # characters in a file name */ #define E_DIMNUM 4 /* # array dimensions in auxiliary entry */ struct external_syment { union { char e_name[E_SYMNMLEN]; struct { char e_zeroes[4]; char e_offset[4]; } e; } e; char e_value[4]; char e_scnum[2]; char e_type[2]; char e_sclass[1]; char e_numaux[1]; }; #define N_BTMASK (017) #define N_TMASK (060) #define N_BTSHFT (4) #define N_TSHIFT (2) union external_auxent { struct { char x_tagndx[4]; /* str, un, or enum tag indx */ union { struct { char x_lnno[2]; /* declaration line number */ char x_size[2]; /* str/union/array size */ } x_lnsz; char x_fsize[4]; /* size of function */ } x_misc; union { struct { /* if ISFCN, tag, or .bb */ char x_lnnoptr[4]; /* ptr to fcn line # */ char x_endndx[4]; /* entry ndx past block end */ } x_fcn; struct { /* if ISARY, up to 4 dimen. */ char x_dimen[E_DIMNUM][2]; } x_ary; } x_fcnary; char x_tvndx[2]; /* tv index */ } x_sym; union { char x_fname[E_FILNMLEN]; struct { char x_zeroes[4]; char x_offset[4]; } x_n; } x_file; struct { char x_scnlen[4]; /* section length */ char x_nreloc[2]; /* # relocation entries */ char x_nlinno[2]; /* # line numbers */ } x_scn; struct { char x_tvfill[4]; /* tv fill value */ char x_tvlen[2]; /* length of .tv */ char x_tvran[2][2]; /* tv range */ } x_tv; /* info about .tv section (in auxent of symbol .tv)) */ }; #define SYMENT struct external_syment #define SYMESZ 18 #define AUXENT union external_auxent #define AUXESZ 18 /* section lengths are in target bytes (not host bytes) */ #define GET_SCN_SCNLEN(ABFD, EXT) \ (H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD)) #define PUT_SCN_SCNLEN(ABFD, INT, EXT) \ H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen) /* lnsz size is in bits in COFF file, in bytes in BFD */ #define GET_LNSZ_SIZE(abfd, ext) \ (H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (in_class != C_FIELD ? 8 : 1)) #define PUT_LNSZ_SIZE(abfd, in, ext) \ H_PUT_16 (abfd, ((in_class != C_FIELD) ? (in) * 8 : (in)), \ ext->x_sym.x_misc.x_lnsz.x_size) /* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes Also put the load page flag of the section into the symbol value if it's an address. */ #ifndef NEEDS_PAGE #define NEEDS_PAGE(X) 0 #define PAGE_MASK 0 #endif #define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \ do \ { \ struct internal_syment *dst = (struct internal_syment *)(INT); \ if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU) \ dst->n_value /= 8; \ else if (NEEDS_PAGE (dst->n_sclass)) { \ asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \ dst->n_value |= (scn->lma & PAGE_MASK); \ } \ } \ while (0) #define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \ do \ { \ struct internal_syment *src = (struct internal_syment *)(INT); \ SYMENT *dst = (SYMENT *)(EXT); \ if (src->n_sclass == C_MOU || src->n_sclass == C_MOS) \ H_PUT_32 (abfd, src->n_value * 8, dst->e_value); \ else if (NEEDS_PAGE (src->n_sclass)) { \ H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value); \ } \ } \ while (0) /* Detect section-relative absolute symbols so they get flagged with a sym index of -1. */ #define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \ ((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \ && (RELOC)->howto->name[0] == 'A') /********************** RELOCATION DIRECTIVES **********************/ struct external_reloc_v0 { char r_vaddr[4]; char r_symndx[2]; char r_reserved[2]; char r_type[2]; }; struct external_reloc { char r_vaddr[4]; char r_symndx[4]; char r_reserved[2]; /* extended pmad byte for COFF2 */ char r_type[2]; }; #define RELOC struct external_reloc #define RELSZ_V0 10 /* FIXME -- coffcode.h needs fixing */ #define RELSZ 12 /* for COFF1/2 */ /* various relocation types. */ #define R_ABS 0x0000 /* no relocation */ #define R_REL13 0x002A /* 13-bit direct reference (???) */ #define R_PARTLS7 0x0028 /* 7 LSBs of an address */ #define R_PARTMS9 0x0029 /* 9MSBs of an address */ #define R_EXTWORD 0x002B /* 23-bit direct reference */ #define R_EXTWORD16 0x002C /* 16-bit direct reference to 23-bit addr*/ #define R_EXTWORDMS7 0x002D /* upper 7 bits of 23-bit address */ #endif /* COFF_TI_H */